A couple took riding the rocket to a new level just before 5:30 p.m. Thursday on board a westbound King St. streetcar.

TTC spokesman Brad Ross confirmed another streetcar rider reported the couple "who were engaged in some activity of a sexual nature" to the operator during evening rush hour.

"It was called in (around Yonge and King)," Ross told QMI Agency. "A supervisor met the streetcar at University Ave., the streetcar was heading westbound, and the couple had left ... I don't know what kind of sex act it was.

"No arrests were made, they'd gotten off the car."

The X-rated tryst on the packed streetcar caused approximately a 20-minute delay along the city's busiest streetcar route.

Although he didn't see the dirty deed, TTC rider Adam Owen was on the streetcar when the operator hit the brakes around University Ave.

"The operator went over the intercom ... he said, 'Indecent exposure is never OK. I'm stopping the streetcar right now. To the person who has done this indecent exposure, you need to leave the streetcar immediately or I'll call the police,'" Owen said.

The streetcar continued to sit in traffic.

"I wanted to have a better view of everything so I got off the streetcar," Owen said. "After a while the police came and went around the streetcar and talked to the operator.

"There were about three or four streetcars backed up ... the car traffic was also backed up because nobody wanted to go past the open (streetcar) doors."

Owen, a regular on the King streetcar, said he's "never seen anything like that before."

He said he heard one of the police officers tell the crowd, "I love Toronto!" as they left the scene.

Police confirmed officers responded to the streetcar scene but the couple was already gone.